This circuit was found in the July 1988 issue of Radio Electronics magazine. It makes use of an operational transconductance amplifier (OTA) still in use today.
The circuit is from the 1990 Motorola Linear Databook. The circuit can be implemented with other...
This circuit maintains on a flashing LED at a frequency determined by the capacitor. The...
This simple circuit indicates whether at a point in the wiring of a car 12 V is present. The clip...